2006ApJ...647.1065K

Query : 2006ApJ...647.1065K

2006ApJ...647.1065K - Astrophys. J., 647, 1065-1074 (2006/August-3)

Chandra and Hubble Space Telescope study of the globular cluster NGC 288.

KONG A.K.H., BASSA C., POOLEY D., LEWIN W.H.G., HOMER L., VERBUNT F., ANDERSON S.F. and MARGON B.

Abstract (from CDS):

We report on the Chandra X-Ray Observatory observations of the globular cluster NGC 288. We detect four X-ray sources within the core radius and seven additional sources within the half-mass radius down to a limiting luminosity of LX=7x1030 ergs/s (assuming cluster membership) in the 0.3-7 keV band. We also observed the cluster with the Hubble Space Telescope Advanced Camera for Surveys and identify optical counterparts to seven X-ray sources out of the nine sources within the HST field of view. Based on the X-ray and optical properties, we find 2-5 candidates of cataclysmic variables (CVs) or chromospherically active binaries and 2-5 background galaxies inside the half-mass radius. Since the core density of NGC 288 is very low, the number of faint X-ray sources of NGC 288 found in the Chandra and HST observations is higher than the prediction on the basis of the collision frequency. We suggest that the CVs and chromospherically active binaries are primordial in origin, in agreement with the theoretical expectation.

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Journal keyword(s): Stars: Binaries: Close - Galaxy: Globular Clusters: Individual: NGC Number: NGC 288 - Stars: Novae, Cataclysmic Variables - X-Rays: Binaries

Nomenclature: Table 1: [KBP2006] CX NN (Nos 1-36). Table 2: [KBP2006] CX NNa (Nos 13a-13b, 19a-19b, 20a-20b).

Simbad objects: 47

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Number of rows : 47
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 104 GlC 00 24 05.359 -72 04 53.20     4.09     ~ 4158 0
2 CXOU J005229.4-263553 X 00 52 29.413 -26 35 53.46           ~ 1 0
3 CXOU J005230.3-263616 X 00 52 30.336 -26 36 16.52           ~ 1 0
4 CXOU J005230.9-263319 X 00 52 30.909 -26 33 19.47           ~ 1 0
5 CXOU J005232.0-263705 X 00 52 32.092 -26 37 05.36           ~ 1 0
6 CXOU J005232.9-263338 X 00 52 32.950 -26 33 38.28           ~ 1 0
7 CXOU J005233.8-263012 X 00 52 33.818 -26 30 12.67           ~ 2 0
8 CXOU J005233.8-262901 X 00 52 33.838 -26 29 01.05           ~ 1 0
9 CXOU J005233.8-263204 X 00 52 33.899 -26 32 04.80           ~ 1 0
10 CXOU J005234.3-263247 X 00 52 34.380 -26 32 47.90           ~ 1 0
11 CXOU J005234.8-263142 X 00 52 34.897 -26 31 42.08           ~ 1 0
12 CXOU J005235.7-263003 X 00 52 35.748 -26 30 03.80           ~ 1 0
13 CXOU J005238.1-263155 X 00 52 38.162 -26 31 55.14           ~ 1 0
14 CXOU J005238.9-263434 X 00 52 38.991 -26 34 34.29           ~ 3 0
15 CXOU J005239.8-263201 X 00 52 39.888 -26 32 01.33           ~ 1 0
16 CXOU J005240.1-263432 X 00 52 40.22 -26 34 31.6           ~ 2 0
17 CXOU J005240.5-263534 X 00 52 40.585 -26 35 34.32           ~ 1 0
18 CXOU J005241.7-262914 X 00 52 41.735 -26 29 14.74           ~ 2 0
19 CXOU J005242.3-263615 X 00 52 42.337 -26 36 15.83           ~ 2 0
20 CXOU J005242.5-263305 X 00 52 42.526 -26 33 05.71           ~ 2 0
21 CXOU J005242.6-263609 X 00 52 42.622 -26 36 09.08           ~ 3 0
22 CXOU J005243.7-263253 X 00 52 43.764 -26 32 53.54           ~ 1 0
23 2MASS J00524394-2632024 X 00 52 43.94 -26 32 02.4           ~ 1 0
24 CXOU J005244.4-263238 X 00 52 44.435 -26 32 38.88           ~ 1 0
25 CXOU J005244.8-263448 X 00 52 44.832 -26 34 48.22           ~ 3 0
26 Cl* NGC 288 SAW V5 SX* 00 52 45.0311762751 -26 33 52.790446459   17.70 17.54     ~ 11 0
27 NGC 288 GlC 00 52 45.24 -26 34 57.4   10 8.13     ~ 1130 0
28 CXOU J005249.6-263007 X 00 52 49.682 -26 30 07.47           ~ 1 0
29 CXOU J005249.7-263038 X 00 52 49.731 -26 30 38.63           ~ 2 0
30 CXOU J005249.7-263205 X 00 52 49.744 -26 32 05.28           ~ 1 0
31 CXOU J005252.1-263308 X 00 52 52.184 -26 33 08.26           ~ 1 0
32 2MASS J00525723-2630490 * 00 52 57.2394283560 -26 30 49.028334156           ~ 2 0
33 CXOU J005257.5-262957 X 00 52 57.519 -26 29 57.76           ~ 1 0
34 CXOU J005257.7-263618 X 00 52 57.700 -26 36 18.90           ~ 1 0
35 CXOU J005259.9-263143 X 00 52 59.980 -26 31 43.10           ~ 1 0
36 CXOU J005300.3-263352 X 00 53 00.307 -26 33 52.12           ~ 1 0
37 CXOU J005300.3-262931 X 00 53 00.341 -26 29 31.06           ~ 1 0
38 CXOU J005302.5-263612 X 00 53 02.583 -26 36 12.27           ~ 1 0
39 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
40 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0
41 NGC 6752 GlC 19 10 52.11 -59 59 04.4           ~ 2121 0
42 [KBP2006] CX 19a X ~ ~           ~ 1 0
43 [KBP2006] CX 20a X ~ ~           ~ 1 0
44 [KBP2006] CX 19b X ~ ~           ~ 1 0
45 [KBP2006] CX 13b X ~ ~           ~ 1 0
46 [KBP2006] CX 20b X ~ ~           ~ 1 0
47 [KBP2006] CX 13a X ~ ~           ~ 1 0

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